No authoritative reference available. No authoritative reference available. Affiliate transaction two. No authoritative reference available. No authoritative reference available. No authoritative reference available. Notional Amount Of Foreign Currency Derivatives TextBlock. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount recover through Environmental Compliance Cost Recovery Tariff. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Other operating revenues of electric companies not elsewhere specified in the taxonomy. No authoritative reference available. No authoritative reference available. No authoritative reference available. Unfunded Commitments. No authoritative reference available. Maximum amount assert by proof of claim. No authoritative reference available. No authoritative reference available. No authoritative reference available. Pre-tax effect of energy related derivatives not designated as hedging instruments. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount of regulatory liability amortized. No authoritative reference available. The carrying amount as of the balance sheet of nuclear fuel held as property plant and equipment. This amount is net of amortization based on the energy produced over the life of the fuel. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Foreign Currency Derivatives Policy [Text Block] No authoritative reference available. Maximum number of months related to maturities in the portfolio not to exceeded from the date of purchase. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Redemption Notice Period. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Increase in Effect of options. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Estimated increase in Environmental Compliance Cost Recovery (ECCR) Tariff. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Other deferred charges and assets. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Non-capital related costs remaining in other regulatory assets. No authoritative reference available. Period of Contract executed by the subsidiary. No authoritative reference available. Fair value of investments calculated at net asset value. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cash Flow Hedge Loss To Be Reclassified Within Twelve Months. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Carrying amount at the balance sheet date of the regulatory asset related to vacation pay to employees. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total of all Common Stockholders' Equity (deficit) items, net of receivables from officers, directors owners, and affiliates of the entity. This excludes temporary equity and preferred and preference stockholders' equity. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Assets Measured On Recurring Basis Total No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Portion Of Actual Earnings Above Approved Roe Band Retained By Subsidiary Company. No authoritative reference available. No authoritative reference available. No authoritative reference available. Line Of Credit Expiry Year 3. No authoritative reference available. Sum of operating profit and nonoperating income (expense) before income taxes, extraordinary items, cumulative effects of changes in accounting principles, and noncontrolling interest. No authoritative reference available. Purchase of interest. No authoritative reference available. Amount recover through traditional base rate tariffs. No authoritative reference available. Non-capital related costs expensed. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Maximum potential collateral requirements arising the from credit-risk-related contingent features. No authoritative reference available. No authoritative reference available. No authoritative reference available. Percentage of proposed retail return on common equity. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The net change during the reporting period in the aggregate amount of construction obligations due within one year (or one business cycle). This includes accounts payable related to construction activities. No authoritative reference available. Charges paid for settlement. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cost deferred in other regulatory assets. No authoritative reference available. No authoritative reference available. No authoritative reference available. Regulatory Hedge Unrealized Gain (Loss). No authoritative reference available. No authoritative reference available. No authoritative reference available. Minimum number of months related to the reset date of maturities in the portfolio with put features or floating rates. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Notional Amount of Interest Rate Derivatives, Interest rate paid. No authoritative reference available. Executable Term-Loans for one year. No authoritative reference available. Agreements with plaintiffs in pending actions. No authoritative reference available. No authoritative reference available. No authoritative reference available. Carrying amount at the balance sheet date of revenues which have been earned but not yet billed. No authoritative reference available. Fair value measurements of investments calculated at net asset value per share as well as the nature and risk of those investments. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Donation to nonprofit organizations. No authoritative reference available. Prescreening costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. Construction work in progress. No authoritative reference available. No authoritative reference available. No authoritative reference available. Company unsecured claims allowed under plan of reorganization. No authoritative reference available. No authoritative reference available. No authoritative reference available. Damages from lost property values and relocating village cost, lower range. No authoritative reference available. Affiliate Transaction Three. No authoritative reference available. Refund period related to a cost-based rate level, months. No authoritative reference available. Affiliate transaction one. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Financing costs of construction work in progress. No authoritative reference available. Estimated decrease in ECCR tariff. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Overhead and variable costs. No authoritative reference available. MaximumExpectedVolumeOfNaturalGasSubjectToSuchFeature. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Refund Period Related To sales Months. No authoritative reference available. Longest Non-Hedge Date. No authoritative reference available. Sum of the carrying amounts as of the balance sheet date of all assets, excluding Property, Plant, and Equipment and Other Property and Investments, that are expected to be realized in cash, sold or consumed after one year or beyond the normal operating cycle, if longer. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Portion of actual earnings above approved ROE band refunded to customers. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Longest Hedge Date. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Carrying amount of other regulatory assets (not elsewhere included) as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost. No authoritative reference available. TimePeriodDuringWhichPaymentTOBeMadeAfterOrderBecomesFinalAndNonAppealable. No authoritative reference available. No authoritative reference available. No authoritative reference available. Claims awarded to companies related to nuclear fuel disposal litigation. No authoritative reference available. Percentage Recovery Through Environmental Compliance Cost Recovery Tariff. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Or Liabilities Gain Loss In Other Included In Other Comprehensive Income. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Non-capital related costs remaining in other deferred charges. No authoritative reference available. Time period for filing a rehearing request. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cash Flow Hedge Gain To Be Reclassified Within Twelve Months. No authoritative reference available. Fair value of derivative liabilities with contingent features. No authoritative reference available. No authoritative reference available. No authoritative reference available. Subject to determinations cost. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Point Range For Proposed Alternate Rate. No authoritative reference available. Revenues from sales of energy supplied by one producer or marketer to another for eventual resale to consumers. No authoritative reference available. No authoritative reference available. No authoritative reference available. Carrying amount at the balance sheet date of customer accounts receivable for retail and wholesale under recovered fuel costs, and other under recovered regulatory costs. No authoritative reference available. Fair Value Gain (Loss). No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Valuation Methodologies. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. FinancialDataForProductsAndServicesTextBlock. No authoritative reference available. Damages from lost property values and relocating village cost, upper range. No authoritative reference available. Recovery costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cost incurred by Mississippi Power associated with generation resource planning, evaluation, and screening activities. No authoritative reference available. Executable Term Loans For Two Years. No authoritative reference available. Renewed credit agreement for Georgia Power. No authoritative reference available. Fair Value Gain Loss Foreign Currency Derivatives. No authoritative reference available. Redemption Frequency. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total deferred gains and losses are expected to be amortized into earnings. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Contingencies and Regulatory Matters. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amounts due from customers or clients, within one year of the balance sheet date (or one operating cycle, if longer), for goods or services that have been delivered or sold in the normal course of business and an amount representing an agreement for an unconditional promise by the maker to pay the entity (holder) a definite sum of money at a future date within one year of the balance sheet, not elsewhere specified in the taxonomy. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Noncurrent regulatory liabilities associated with deferred income tax liabilities. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process. These revenues are not expected to be credited within one year or the normal operating cycle if longer. No authoritative reference available. Amount recover through Municipal Franchise Fee Tariff. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Maximum maturity for longer term investment grade fixed income obligations. No authoritative reference available. No authoritative reference available. No authoritative reference available. Civil penalties under clean Air Act per day, upper range. No authoritative reference available. Assumed average stock price. No authoritative reference available. Estimated Increase In Dsm Tariffs. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total obligations, excluding Long-term Debt, incurred as part of normal operations that is expected to be repaid beyond the following twelve months or one business cycle. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amortization of regulatory liability up to one third if subsidiary does not file for retail base rate increase. No authoritative reference available. Net quantity sold of Derivatives not designated as hedges. No authoritative reference available. No authoritative reference available. No authoritative reference available. Maximum number of days related to dollar weighted average portfolio maturities regarding commingled funds. No authoritative reference available. The regulatory liability as of the balance sheet date for the amount recovered from ratepayers for removal costs associated with utility plant in service which are not recognized as a liability under Statement of Financial Accounting Standards No. 143, "Accounting for Asset Retirement Obligations" and FASB Interpretation No. 47, "Accounting for Conditional Asset Retirement Obligations." No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Tax credits certified by IRS. No authoritative reference available. No authoritative reference available. No authoritative reference available. Carrying amount of other regulatory assets (not elsewhere identified) as of the balance sheet date of capitalized costs of regulated entities that are not expected to be recovered through revenue sources within one year or the normal operating cycle if longer. No authoritative reference available. Financial instruments not having carrying amount equal to fair value Text Block. No authoritative reference available. The net change during the reporting period in the value of certain assets that are created when regulatory agencies permits public utilities to defer costs to the balance sheet. No authoritative reference available. Pre-tax effect of unrealized derivative gains (losses). No authoritative reference available. Net quantity Purchase of Derivatives not designated as hedges. No authoritative reference available. No authoritative reference available. No authoritative reference available. Previously expensed. No authoritative reference available. Portion Of Shortfall Below Approved Roe Band Bearable To Retail Customers. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Line Of Credit Expiry Year 2. No authoritative reference available. No authoritative reference available. No authoritative reference available. Notional amount of interest rate derivatives. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Estimated Increase In Recovery Of Costs Of Plant Units By Cccr Tariff. No authoritative reference available. No authoritative reference available. No authoritative reference available. Time period to collect fuel balance. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total increase in earnings in the period representing the cost of equity (rate of return) used to finance construction of regulated assets, which is expected to be recovered through rate adjustments. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Accrued interest for unrecognized tax benefits text block. No authoritative reference available. The amount for other current regulatory liabilities not elsewhere included. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process. These revenues are expected to be credited within one year. No authoritative reference available. No authoritative reference available. No authoritative reference available. Liability associated with tax benefits that do not currently fully meet the "more likely than not" threshold as defined by FIN 48. This line item includes both federal and state taxes. No authoritative reference available. The amount for other noncurrent regulatory liabilities not elsewhere included. Regulatory liabilities represent probable future reductions in revenues associated with amounts that are expected to be credited to customers through the ratemaking process. These revenues are not expected to be credited within one year or the normal operating cycle if longer. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount of government construction cost incentives received. No authoritative reference available. Carrying amount at the balance sheet date for long-lived physical assets used in the normal conduct of business and not intended for resale, less depreciation. No authoritative reference available. Changes in Stockholders' Equity. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Notional Amount of Interest Rate Derivatives, Interest Rate Received. No authoritative reference available. No authoritative reference available. No authoritative reference available. The current period expense charged against earnings on long-lived, physical assets used in the normal conduct of business and not intended for resale to allocate or recognize the cost of assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset. Excludes amortization of nuclear fuel. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Changes in the fair value measurement of the Level 3 items. No authoritative reference available. Civil penalties under clean Air Act per day, lower range. No authoritative reference available. Noncurrent regulatory assets associated with deferred income tax liabilities that are expected to be recovered from customers through the ratemaking process. No authoritative reference available. Requested amount increase in retail revenues. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The net change during the period in the amount of cash payments due to taxing authorities for income and nonincome-related taxes. No authoritative reference available. Additional costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Liabilities Measured On Recurring Basis Liabilities total. No authoritative reference available. Total fuel cost billings to increase. No authoritative reference available. No authoritative reference available. No authoritative reference available. Revenues from sales of electric energy to retail regulated customers. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Decrease in fair value of the funds, including reinvested interest and dividends. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Portion Of Shortfall Below Approved Roe Band To Be Accepted By Company. No authoritative reference available. No authoritative reference available. No authoritative reference available. Construction cost capital. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Carrying amount at the balance sheet date of underrecovered fuel costs allowed to be deferred by regulatory authorities, that are expected to be recoverable through rate adjustments after one year. No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount Recover Through Demand Side Management Tariff. No authoritative reference available. Total prescreening costs incurred during the period. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Maximum Retail ROE Allowed To Earn. No authoritative reference available. Prescreening costs reclassified to CWIP. No authoritative reference available. Line Of Credit Expiry Year 1. No authoritative reference available. The cash outflow (inflow) for a financial contract that settles in the period relating to operating activities. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Significantly increase or decrease in the amount of the unrecognized tax benefits. No authoritative reference available. Pre-construction costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. Pre-tax effect of interest rate derivatives designated as fair value hedging instruments. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Percentage Recovery Through Traditional Base Rate Tariffs. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Requested rate increase in retail revenues. No authoritative reference available.